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| Home > Publications database > Arrhenius Behavior of the Bulk Na-Ion Conductivity in Na 3 Sc 2 (PO 4 ) 3 Single Crystals Observed by Microcontact Impedance Spectroscopy > print |
| Home > Publications database > Arrhenius Behavior of the Bulk Na-Ion Conductivity in Na 3 Sc 2 (PO 4 ) 3 Single Crystals Observed by Microcontact Impedance Spectroscopy > print |
| 001 | 850868 | ||
| 005 | 20240712113103.0 | ||
| 024 | 7 | _ | |a 10.1021/acs.chemmater.8b00179 |2 doi |
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| 100 | 1 | _ | |a Rettenwander, Daniel |0 0000-0002-2074-941X |b 0 |e Corresponding author |
| 245 | _ | _ | |a Arrhenius Behavior of the Bulk Na-Ion Conductivity in Na 3 Sc 2 (PO 4 ) 3 Single Crystals Observed by Microcontact Impedance Spectroscopy |
| 260 | _ | _ | |a Washington, DC |c 2018 |b American Chemical Society |
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| 520 | _ | _ | |a NASICON-based solid electrolytes with exceptionally high Na-ion conductivities are considered to enable future all solid-state Na-ion battery technologies. Despite 40 years of research the interrelation between crystal structure and Na-ion conduction is still controversially discussed and far from being fully understood. In this study, microcontact impedance spectroscopy combined with single crystal X-ray diffraction, and differential scanning calorimetry is applied to tackle the question how bulk Na-ion conductivity σbulk of sub-mm-sized flux grown Na3Sc2(PO4)3 (NSP) single crystals is influenced by supposed phase changes (α, β, and γ phase) discussed in literature. Although we found a smooth structural change at around 140 °C, which we assign to the β → γ phase transition, our conductivity data follow a single Arrhenius law from room temperature (RT) up to 220 °C. Obviously, the structural change, being mainly related to decreasing Na-ion ordering with increasing temperature, does not cause any jumps in Na-ion conductivity or any discontinuities in activation energies Ea. Bulk ion dynamics in NSP have so far rarely been documented; here, under ambient conditions, σbulk turned out to be as high as 3 × 10–4 S cm–1 at RT (Ea, bulk = 0.39 eV) when directly measured with microcontacts for individual small single crystals. |
| 536 | _ | _ | |a 131 - Electrochemical Storage (POF3-131) |0 G:(DE-HGF)POF3-131 |c POF3-131 |f POF III |x 0 |
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| 700 | 1 | _ | |a Fleig, Jürgen |0 P:(DE-HGF)0 |b 8 |
| 773 | _ | _ | |a 10.1021/acs.chemmater.8b00179 |g Vol. 30, no. 5, p. 1776 - 1781 |0 PERI:(DE-600)1500399-1 |n 5 |p 1776 - 1781 |t Chemistry of materials |v 30 |y 2018 |x 1520-5002 |
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